Improvement in lamp-chimneys



H. GAPPLEBY.

Lamp Chimney.

No. 55,450. Patented June 12, 1866,

WITNESSES.-

UNITED STATES PATENT OFFICE.

H. C. APPLEBY, OF GONNEAUT, OHIO.

IMPROVEMENT l N LAM P-CHIMNEYS.

Specification forming part of Letters Patent No. 55,450, dated June 12, 1866.

To all whom it may concern.-

Be it known that I, H. O. APPLEBY, of (Jonneaut, in the county of Ashtabula and State of Ohio, have invented a new and useful Improvement in Lamp-Chimneys; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being bad to the accompanying drawings, forming a part of this specification, in which- Figure 1 is a side elevation of myinvention. Fig. 2 is a tranverse section taken on the plane of the line 00 m, Fig. 1.

Similarlelters of referenoeindicatelike parts.

My invention consists in construotinga glass chimney for lamps with corrugations, flutings, or the like, running spirally around the chimney, whereby the chimney will have a better capacity for expansion, and therefore be less liable to break, than ordinary glass chimneys.

A designates a chimney for a coal-oil lamp, and a to designate a number of corrugations or ribs which run spirally around the chimney from end to end. These corrugations are formed in the chimney at the time it is made, and can be done without increasing the expense of the chimney.

By constructing the chimney with these ribs or corrugations, as described, it is allowed a perfectly free chance for expansion on account of the elasticity of the corrugations, and therefore the glass will be enabled to expand or contract with little or no liability of its breaking.

I am aware that a patent has been granted W. L. Jukes, patented May 12, 1863, for a lamp- HENRY O. APPLEBY.

Witnesses U. R. GODDARD, H. W. GOULD. 

